1/*
2 * [The "BSD licence"]
3 * Copyright (c) 2010 Ben Gruver (JesusFreke)
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29package org.jf.dexlib;
30
31import org.jf.dexlib.Util.Input;
32
33import java.util.Arrays;
34
35public class OdexHeader {
36
37    /**
38     * the possible file format magic numbers, represented as the low-order bytes of a string.
39     */
40    public static final byte[] MAGIC_35 = new byte[] {0x64, 0x65, 0x79, 0x0A, 0x30, 0x33, 0x35, 0x00}; //"dey\n035" + '\0';
41    public static final byte[] MAGIC_36 = new byte[] {0x64, 0x65, 0x79, 0x0A, 0x30, 0x33, 0x36, 0x00}; //"dey\n036" + '\0';
42
43    public final byte[] magic;
44    public final int dexOffset;
45    public final int dexLength;
46    public final int depsOffset;
47    public final int depsLength;
48    public final int auxOffset;
49    public final int auxLength;
50    public final int flags;
51
52    public final int version;
53
54    public OdexHeader(Input in) {
55        magic = in.readBytes(8);
56
57        if (Arrays.equals(MAGIC_35, magic)) {
58            version = 35;
59        } else if (Arrays.equals(MAGIC_36, magic)) {
60            version = 36;
61        } else {
62            throw new RuntimeException("The magic value is not one of the expected values");
63        }
64
65        dexOffset = in.readInt();
66        dexLength = in.readInt();
67        depsOffset = in.readInt();
68        depsLength = in.readInt();
69        auxOffset = in.readInt();
70        auxLength = in.readInt();
71        flags = in.readInt();
72        in.readInt(); //padding
73    }
74}
75